Li Wei, Sheng Wenbo, Li Bin, Jordan Rainer
Chair of Macromolecular Chemistry, Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, Mommsenstr. 4, 01069, Dresden, Germany.
Physik Department, TUM-Technische Universität München, James-Franck-Straße 1, 85748, Garching, Germany.
Angew Chem Int Ed Engl. 2021 Jun 7;60(24):13621-13625. doi: 10.1002/anie.202103182. Epub 2021 May 7.
We report herein a facile and generalized approach to the modification of solid surfaces with polymer brushes under ambient conditions: filter paper-assisted surface-initiated Cu -mediated controlled radical polymerization (PSI-CuCRP). The polymerization solution wetted filter paper is sandwiched between a copper plate and an initiator-modified substrate, which allows the creation of a surface-initiated polymerization (SIP) "band-aid" so that everyone can perform the surface grafting selectively with good control over the quality of the polymer brushes employing low concentration and microliter amounts of the monomer solution. The versatility of this method is demonstrated by grafting different homo-, block-, and multicomponent polymer brushes by using the same activation system and reaction conditions, the polymerization process can be precisely controlled to yield uniform polymers and show high chain-end functionality which is exemplified by in situ tetra-copolymerization. The combination of photolithography and paper cutting enables to prepare arbitrary three-dimensional patterned polymer brushes on the surface.
滤纸辅助表面引发的铜介导可控自由基聚合（PSI-CuCRP）。将润湿了聚合溶液的滤纸夹在铜板和引发剂修饰的基底之间，这使得能够创建一个表面引发聚合（SIP）“创可贴”，从而每个人都可以使用低浓度和微升量的单体溶液选择性地进行表面接枝，并对聚合物刷的质量进行良好控制。通过使用相同的活化体系和反应条件接枝不同的均聚物、嵌段共聚物和多组分聚合物刷，证明了该方法的通用性，聚合过程可以精确控制以产生均匀的聚合物，并显示出高链端官能度，原位四元共聚就是一个例证。光刻和剪纸的结合能够在表面制备任意三维图案化的聚合物刷。
